6-chloro-delta1,4,6-pregnatriene-17alpha, 21-diol-3,20-diones



United States Patent M 3,232,965 6-CHLORO-A -PREGNATRIENE=17,21-

Dl0L-3,20-DIONES Howard J. Ringold and George Rosenkranz, Mexico City,

Mexico, assignors, by mesne assignments, to Syntex Corporation, a corporation of Panama No Drawing. Filed June 20, 1958, Ser. No. 743,466 35 Claims. (Cl. 260-39145) The present invention relates to novel cyclopentanophenanthrene derivatives and to a process for the production thereof.

More particularly the present invention relates to novel 6 chloro-A -pregnatrien-17a,2l-diol-3,2O-dione derivatives having an oxygen function at C-11, i.e. 113- hydroxy or ll-keto, the 21-mono hydrocarbon carboxylic acid esters of less than 12 carbon atoms of these derivatives, and the same compounds having in addition a 9&- halo selected from the group consisting of fluorine, bromine or chlorine. The present invention also relates to the corresponding A -dien derivatives which are intermammals but unlike other gluco-corticoids do not exhibit sodium retention effects.

In US. patent application Serial No. 670,366, filed July 8, 1957, now abandoned there has been disclosed the novel cortical hormones 6a-chloro-n -pregnenal7a, 21-diol-3,l1,20-tr.ione and its 21-esters and 6a-chloro- A -pregnadien-17a,21-dio1-3,11,20-trione and its 2l-esters. The same compounds having an llfl-hydroxy group rather than an ll-keto group are disclosed in US. patent application Serial No. 670,368, filed July 8, 1957, now abandoned. In US. patent application Serial No. 741,753, filed June 13, 1958, now abandoned, the same 60c-0l1l0f0 derivatives having in addition a 9a-halo group are disclosed.

In accordance with the present invention it has been discovered that dehydrogenation of the aforementioned ot-chloro-o and A derivatives with chloranil in namyl alcohol solution produces the corresponding 6- chloro-A -compounds. Dehydrogenation of the 604- chloro-A derivatives with chloranil in xylene produced 6-chloro-A -derivatives which may be further dehydrogenated to 6-ohloro-A -compounds with selenium dioxide with selenium dioxide in t-butanol or chloranil in n-arnyl alcohol.

The novel cortical hormones of the present invention may be illustrated by the following formula:

OInOR CHZOR In the above formula X represents :0 or

Y represents hydrogen or a halo selected from thexgroup consisting of fiuoro, chloro and bromo. R represents 3,232,965 Patented Feb. 1, 1966 hydrogen or a hydrocarbon carboxylic acid ester group of less than 12 carbon atoms of a type known in the steroid art. These ester groups may be for example saturated or unsaturated, straight or branched chain aliphatic, cyclic or cyclic-aliphatic and may be conventionally substituted as with rnethoxy or halogen. Typical ester groups are acetate, propionate, butyrate, hemisuccinate, caproate, benzoate, trimethylacetate, cyclopentylpropionate, phenoxypr-opionate and ,B-chloropropionate.

The process for the production of the novel compounds set forth above may be illustrated by the 'following equation:

CIHQOR (BLUE 0 O 0 chloranil 02 Xylene O:

i I 01 Cl hloranil selenium dioxide Win3 alcohol or chloranil and n-amyl alcohol CH2OR CH2OR chloranil alcohol or O xylene o j orr as the ill-acetate of 6a-chloro hydrocortisone, cortisone, prednisone or prednisolone. in the case of the 21-acetate of 6u-chloro-hydrocortisone or cortisone, as indicated, refluxing with chloranil and amyl alcohol for about 1 day gave, after conventional separation and purification, the ZI-acetate of 6-chloro-A -pregnatriene-l15,1711)l-triol-3,20-dione and the 21-a-cetate of 6-chloro-A -pregnatriene-17a,21-diol-3 ,1 1,20-trione respectively. When the same starting materials were refluxed with chloranil and xylene the corresponding 21- a-cetate of A -pregnadiene-l1B,l7a,21-triol-3,2Odione and d -pregnadiene-l7a,2l-diol-3,11,20-trione were prepared. Refiuxing the corresponding l-dehydro com- .pounds with chloranil in the presence of either n-amyl alcohol or xylene produced dehydration at C-6, C-7 so that the A -derivatives resulted. As previously set forth the A compounds upon treatment with selenium dioxide gave the corresponding A derivatives as did treatment with chloranil in n-amyl alcohol.

The 21-acetates thus produced upon conventional saponification preferably with sodium methoxide in methanol gave the corresponding 2l-alcohols. Conventional esterification with corresponding acid anhydrides .or halides in pyridine gave the 21-mono esters previously described.

The following specific examples serve to illustrate but are not intended to limit the present invention.

3. Example I A mixture of g. of the 21-acetate of 6a-chloro hydrocortisone, 7 g. of chloranil and 100 cc. of n-amyl alcohol was refluxed for 16 hours, cooled and diluted with ether. The solution was successively washed with water, 5% sodium carbonate solution and water, dried over anhydrous sodium sulfate, filtered and evaporated to dryness under reduced pressure. Chromatographic purification of the residue yielded the 21-acetate of 6- chloro-A -pregnatriene-11,8,l7a,21-triol-3,20-dione.

Similarly, the 21-acetate of 6a-chloro-cortisone was converted into the 21-acetate of 6-chloro-A -pregnatriene-17a,21-diol-3-,11-20-trione.

Example II A mixture of 5 g. of the ZI-acetate of 6a-chlorohydrocortisone, 4 g. of chloranil and 100 cc. of xylene wa refluxed for 12 hours and then the reaction product was worked up as described in the previous example, thus giving the 21-acetate of 6-chloro-N -pregnadiene-1115, 17a,21-triol-3,20-dione.

Similarly, the 21-acetate of 6a-chloro-cortisone was converted into the 21-acetate of 6-chloro-A -pregnadiene- 17a, 21-diol-3,11,20-trione.

1 g. of the 21-ac'tate of 6-chloro-A -pregnadiene- 11B,17a,21-triol-3,20-dione was mixed with 50 cc. of anhydrous t-butanol, 300 mg. of selenium dioxide and 0.1 cc. of pyridine and the mixture was refluxed for 70 hours under an atmosphere of nitrogen, cooled and diluted with ethyl acetate. The mixture was filtered through celite and the residue was washed with ethyl acetate. The combined filtrate and washings Was evaporated to dryness under reduced pressure and the residue was triturated with water. The precipitate was collected, dried and purified by chromatography. There was thus obtained the 21-acetate of 6-chloro-A -pregnatriene-11,B,17a,21- triol-3,20-dione, identical to the compound obtained in accordance with the previous example.

Similarly, the treatment of the 21-acetate of 6-chloro- A -pregnadiene-17a,21-diol-3,11,20-trione with selenium dioxide afforded the 21-acetate of 6-chloro-A -pregnatriene-17a,21-diol-3,11,20-trione, identical to the compound obtained in accordance with the previous example.

Example III 1 g. of the 21-acetate of 6-chloro-A -pregnadiene- 11 2, 17cc, 21-triol-3,20-dione, obtained as described in the first paragraph of the previous example, was treated with chloranil in n-amyl alcohol solution following the method described in Example I. There was thus obtained the 21-acetate of 6-chloro-A -pregnatriene-11/3,17a,21-triol- 3,20-dione. When the same method was applied to the 21-acetate of 6-chloro-A -pregnadiene-170:,21-diol-3,11, 20-trione, there was produced the 21-acetate of 6-chloro- A -pregnatriene-17a,21-diol-3,11,20-trione; these trienes were identical to those obtained in accordance with the method of Example I.

Example 1V When in the method of Example I the 21-acetate of 6a-chloro-hydrocortisone and 6a-chloro-cortisone were substituted by those of 6a-chloro-prednisolone and 60achloro-prednisone, there were obtained the 21-acetates of 6 chloro A1416 pregnatn'ene 11fl,17oz,21 triol- 3,20-dione land 6-chloro-A -pregnatriene-17a,2l-diol- 3,11,20-trione, respectively, identical to the compounds obtained by the method of Example I.

Example V g A solution of 1 g. of the 21-acetate of 6-chloro-A pregnatriene-l1p,17a,21-triol-3,20-dione in 200 cc. of methanol was cooled to 0 C. and treated, under an atmosphere of nitrogen, with 125 mg. of sodium methoxide. The mixture was kept at 0 C. for 15 minutes and then neutralized with acetic acid and evaporated to dryness under vacuum. The residue was triturated with water and the precipitate Was collected, dried and crystallized from acetone-hexane, thus giving the free 6-chloro-A -pregnatriene-l 1p, 17a,21-triol-3,20--dione.

By the same method there were prepared the free 6- chloro A pregnatriene 170:,21 diol 3,11,20- trione, 6 chloro A pregnadiene 11,8,17a,21 triol 3,20 dione and 6 chloro A pregnadiene 170:,21- diol-3 ,11,20-trione.

Example VI A mixture of 500 mg. of 6-chloro-A -pregnatriene- 17a,21-diol-3,11,20-trione, 5 cc. of pyridine and 0.5 cc.

of propionie anhydride was kept at room temperature for 4 hours, poured into ice water and extracted with methylene dichloride. The extract was washed with water, dilute hydrochloric acid, sodium bicarbonate solution and water, dried over anhydrous sodium sulfate, filtered and evaporated to dryness. Crystallization of the residue from acetone-hexane yielded the 21-propionate of 6- chloro-A -pregnatriene-17u,21-diol-3,11,20-trione.

Similarly, and by reaction with the corresponding acid anhydrides or chlorides having up to 12 carbon atoms, there were prepared the corresponding hydrocarbon carboxylie 21-esters of all of the free alcohols obtained in accordance with Example V. Included were the henzoates, cyclopentylpropionates and other esters previously described.

Example VII A mixture of 5 g. of the 21-acetate of 6a-chloro-9a fluoro-hydrocortisone, 7 g. of chloranil and cc. of anhydrous n-amyl alcohol was refluxed for 16 hours, cooled, diluted with 200 cc. of ether and successively washed with water, 5% sodium carbonate solution and water, dried and evaporated to dryness under reduced pressure. The residue was purified by chromatography, thus giving the ZI-acetate of 6-chloro-9a-tfluoro-A -pregnatriene-1 1B, 17a,21-triol-3,20-dione.

Similarly, the reaction of the 21-acetates of the corresponding 60c chloro 9a halo A pregnene- 17a,21-diol-3,20-diones oxygenated at C-11 produced the following compounds: the acetates of 6-chloro-9a-bromoand 6,90; dichloro A pregnatriene l1/3,17a,21- triol-3,20-dione; of 6-chloro-9a-fluoro-, of 6-Cl1lOI0-9ozbromo and of 6,9a-dichloro-A -pregnatriene-17a,21- diol-3,1 1,20-trione.

Example VIII A mixture of 5 g. of the 21-acetate of 6oc-ChlO1'O-9ozfiuoro-hydrocortisone, 4 g. of chloranil and 100 cc. of xylene was refluxed for 12 hours and then the reaction product was isolated by the method described in the previous example, to give the 21-acetate of 6-ChlOIO-9onfiuoro-A -pregnadiene-115,17a21-triol-3 ,20-dione.

Similarly, the 21-acetates of the corresponding 6achloro-9a-halo-A -pregnene-17a;,21-diol-3,20-diones oxygenated at C11 were converted into the ZI-acetates of 6 chloro 9a bromo A pregnadiene 11,8,17oc,21- triol 3,20 dione, of 6,9a dichloro -'A pregnadiene- 11B,17u,21 triol 3,20 dione, of 6 chloro 9a-fluoro- A -pregnadiene-17a,21-diol3,11,20-trione, of 6-chloro- 9a bromo A pregnadiene 17:1,21 diol 3,11,20- trione and of 6,906 dichloro A -pregnadiene-17a,21- diol-3,11,20-trione.

1 g. of the 21-acetate of 6-chloro-9a-fluoro-A -pregnadiene-l1/3,17a,21-triol-3,20-dione was mixed with 50 cc. of anhydrous t-butanol, 300 mg. of selenium dioxide and 0.1 cc. of pyridine and the mixture was refluxed for 70 hours under an atmosphere of nitrogen. After cooling, the mixture was diluted with ethyl acetate and filtered through celite, Washing the filter with ethyl acetate. The combined filtrate and washings was evaporated to dryness under reduced pressure and the residue was triturated with water. The precipitate was collected by filtration, washed with water, dried and chromatographed, thus producing 5 the 2l-acetate of' 6-chloro-9a-fluoron -pregnatriene- 1 1 13,17a,21-t1iO1-3,20+di0n8.

Similarly, the treatment with selenium dioxide, as described above, of the other ZI-acetates of 6-0131010-9ochalo-A pregnadiene-l7a,2l-diol-3,20-diones oxygenated at -11, furnished the ZI-ace'tates of the corresponding 6-c1hloro-9whalo-A -prcgnatriene 170;,21 diol 3,20- dione oxygenated at C-11, identical to the ones produced by the method of Example VII.

Example IX A solution of 1 g. of the 21-acetate of 6-chloro-9afluono-M -pregnadiene-l 1fi,17ot,21-triol 3,20 dione, ob-

, tained by the method of the previous example, in n-amyl Example X When in the method of Example VII the 21-acetate of a 6a-chloro-9a-halo-A -pregnene 1706,21, diol-3,20-dione oxygenated at C-ll was substituted by the 2l-acetate of a 6a-chl oro 9oz halo-A pregnadiene17a,21-diol-3,20- dione oxygenated at C-11, there were obtained the 21- acetates of the corresponding 6-chloro-9u-haIO-A -pregnatriene-l7u,21-diol-3,20.-diones oxygenated at C1 1, identical to the compounds obtained in accordance with the method of Example VII.

Example XI A solution of 1 g. of the 21-acetate of 6-ChlOIO-9otfluoro-A -pregnatriene 11fl,170c,21 triol-3,20-di0ne in 200 cc. of methanol was cooled and mixed with 125 mg. of sodium methoxide, under an atmosphere of nitrogen and taking care that the temperature of the mixture did not rise over 0 C. After 15 minutes at this temperature the mixture was neutralized with acetic acid and evaporated to dryness under vacuum. The residue was triturated with water and the precipitate was collected and recrystallized from acetone-hexane, thus yielding the free 6-chloro-9a-flworo-A f -pregnatriene 11fi,l7ot,21 triol- 3,20-dione.

Similarly, the 21-acetates of the other new 6-chloro-9ahal o dienes and trienes of Examples VII to X were saponitied to the corresponding free alcohols.

Example XII 500 mg. of 6-chloro-9a-fiuor-o-A -pregnatriene-111B, 17u,21-triol-3,20-dione was dissolved in cc. of pyridine, mixed with 0.5 cc. ct" propionic anhydride and kept standing at room temperature for 4 hours. The mixture was then poured into ice Water and extracted with methylene dichloride. The extract was Washed with Water, dilute hydrochloric acid, sodium bicarbonate solution and water, dried and evaporated to dryness. Recrystallization of the residue from acetone-hexane furnished the 21-pr0pionate of 6-chloro-9wfluoro-A -pregnatriene-115,17a,21-triol- 3,20-dione.

Similarly, by reaction with the corresponding acid anhydride or chloride having up to 12 carbon atoms, there were prepared the corresponding hydrocarbon carboxylic 2l-esters of the other 6-chloro-9a-halo dienes and trienes in accordance with Example XI. Included were the bendescribed.

6 We claim: 1. A compound of the following formula:

CHZOR Y is selected from the group consisting of hydrogen,

fluoro, chloro and bromo, andR is selected from the group consisting of hydrogen and to a hydrocarbon carboxylic ester group ofless than 12 carbon atoms.

2. 6-chloro A pregnadiene 17 1,21 diol 3,11,20- trione.

3; The ZI-hydrocanbon.carboxylie esters or less than 12 carbon atoms of 6 chloro-A pregnadiene-17a,2l-diol- 3,1 1,20-trione.

4. 6,904 dichloro-A apregnad-iene 170:,21 dial-3,11, 20-trione.

5. The 21-hydrocar bon canboxylic esters of less than 12 carbon atoms of 6,9a-dichloro-M: -epregnadiene-lh, 21-diol-3,11,20-trione.

6. 6 chloro fiuoro-A -pregnadiene-l7u,2l-diol- 3 1 1,20-trione 7. The Zd-hydrocarbon carboxylic esters of less than 12 carbon atoms of 6-chloro-9wfluoro-M -pregnadiene 17a,21-diol3,11,20-tri0ne.

8. 6-chl'oro-9apromo-A -pregnadiene 17:1,21' diol- 3,1 1,20-trione 9. The 21-hydrocarbon carboxylic esters or less than 12 carbon atoms of 6-chloro-9oubromo-A pregnadiene- 1704,21-diol-3,1-1,20-trione.

10. 6-chloro-A pregnadiene 11fl,17a,21 triol-3,20- dione.

11. The 2l-hydrocanb on canboxyl ic esters of less than 12 carbon atoms of 6 chloro-A -pregnadiene-l1[3,17a,21- =triol-3,20dione.

12. 6,9a-dichlom-M -pregnadiene 11,8,17ot,21 triol- 3,20-dione.

13. The ZI-hydrocarbon carboxylic esters 01f less than 12 carbon atoms of 6,9a-dichloro-A -pregnadiene-11B, 17a,2l-trio -3 ,20-dione.

15. The 2l-4hydrocanbon carboxylic esters of less than 12 carbon atoms of 6-chlorm9a-fiuloro-A -pregnadiene- 11/3,17a,21-triol-3,20-dione.

16. 6-chloro 90c bromo-A -pregnadiene-11fi,17a,2 1- triol-3,20'dione.

17. The 21-hydrocarb'on carboxylic esters of less than 12 carbon atoms of 6-ch1lono-9abromo-A -pregnadiene- 11fi,l7u,21 triol-3,20-dione.

18. A compound of the following formula:

CHzOR wherein X is selected [from the group consisting of =0 and Y is seleoted from the group consisting of hydrogen, fluoro, .chloro and bromo, and R is selected from the group consisting of hydrogen and a hydrocarbon carboxylic ester group of less than 12 carbon atoms.

19. 6-chloro-A apregnatriene 17oc,21 dbl-3,11,20- trione 249. The 21-hydrooarbon oarboxylic esters of less than 12 carbon atoms of 6-chl0roA -pregnatriene-17a,21- diol-3,11,20-trione.

21. 6,9oa dichloro A pregnatriene-17u,21-diol- 3,1 1,20-trione 22. The 21-hydrocarbon earboxylic esters of less than 12 carbon atoms of 6,9tx-A regnatriene-17a,2l-diol- 3,11,20 trione.

23. 6 chloro-9a-fluoro-A pregnatriene-17u,21-diol- 3,1 1,20-trione.

24. The 2l hydrocairbon canboxylie esters of less than 12 carbon atoms of 6-chloro-9u-fluorO-A -pregnatriene- 17a,21-diol-3,11,20-trione.

25. 6 ohl0ro-9a-bromo-A -pregnatriene-17oc,2l-diol- 3,11,20-trione.

26. The 21-hydocarbion carboxylic esters of less than 12 carbon atoms of 6-ohloro-9a-bromo-A pregnatriene- 17 a,21-diol-3,1 1,20-trione.

27. 6 chl'oro-A -pregnatriene-115,17a,21-triol-3,2O- dione.

28. The 21-hydrooarbon carboxylic esters of less than 12 carbon atoms of 6-ch1oro-A -pregnatriene-l1 8,170, 21-triol-3 ,ZO-dione.

29. 6,9 diohloro-A pregnatriene-11p,17ot,21-triol- 3,20-dione.

30. The 21-hydrocarbon carboxylic esters of less than 8 12 carbon atoms of 6,9u-dichloro-A -pregnatriene-I1B, 17a,21-triol-3,20-dione.

32. The ZI-hydrocarbon oarboxylic esters of less than 12 carbon atoms of 6-ohloro-9a-fluoro-A -pregnatriene- 11,8,17a,21-t1'io1-3,20-dione.

33. 6 chloro-9ot-bromo-A pregnatriene-11,8,17u,21- triol-3,20-dione.

34. The 21-hydrocarbon carboxylie esters of less than 12 carbon atoms of 6-chloro-9oa-bromo-A pregnatriene- 11B,17a,21-triol-3,20-dione.

35. Compounds of the general formula:

CHZOR No references cited.

LEWIS GOTTS, Primary Examiner.

WALTER A. MONDANCE, B. E. LANHAM, IRVING MARCUS, Examiners. 

35. COMPOUNDS OF THE GENERAL FORMULA: 